A nurse assesses the heart after acetylcholine because the effect of acetylcholine on the heart is to:
A) decrease the refractory period.
B) increase calcium influx.
C) increase the strength of myocardial contraction.
D) decrease the heart rate.

Question

Quizplus · Accepted Answer

Acetylcholine, when acting on the heart, primarily affects the parasympathetic nervous system, leading to a decrease in heart rate by increasing the permeability of the heart's pacemaker cells to potassium, which slows down the rate of depolarization.

A Nurse Assesses the Heart After Acetylcholine Because the Effect